Аннотация:Cross sections for inelastic scattering of electrons from hydrogen and deuterium were measured for incident energies from 4.5 to 18 GeV, at scattering angles of 18\ifmmode^\circ\else\textdegree\fi{}, 26\ifmmode^\circ\else\textdegree\fi{}, and 34\ifmmode^\circ\else\textdegree\fi{}, and covering a range of squared four-momentum transfers up to $20 {(\frac{\mathrm{GeV}}{c})}^{2}$. Neutron cross sections were extracted from the deuterium data using an impulse approximation. Comparisons with the proton measurements show significant differences between the neutron and proton cross sections.